脱式计算（能简算的要简算）
127 －(57 +12 ) [1-(14 +38 )]÷1/4 18 ×58+18 ×42 45 ×47 ×54 －13 59 ×6+49 ÷16 180÷2.5÷4
sorry,刚才打错了。12/7 －(5/7 +1/2 ) [1-(1/4 +3/8 )]÷1/4 1/8 ×58+1/8 ×42 4/5 ×4/7 ×5/4 －1/3 5/9 ×6+4/9 ÷1/6 180÷2.5÷4
=127-57-12
=70-12
=58
[1-(14 +38 )]÷1/4
= 4-52*4
= (60-1)*6+49/16
=360-6+3又16分之1
=354+3又16分之1
=357又16分之1
180÷2.5÷4
=180÷(2.5*4)
=180÷10
=18
白做了半天！
12/7 －(5/7 +1/2 )
=（12-5）/7-1/2
=1-1/2
=1/2
[1-(1/4 +3/8 )]÷1/4
= 4-1-3/2
=3-3/2
=1又2分之1
1/8 ×58+1/8 ×42
=(1/8)*(58+42)
=100/8
=25/2
=12.5
4/5 ×4/7 ×5/4 -1/3
=4/7-1/3
=(12-7)/21
=5/21
5/9 ×6+4/9 ÷1/6
=6*(5/9+4/9)
=6
180÷2.5÷4
=180÷(2.5*4)
=180÷10
=18
做了两遍，如有帮助可采纳。追问
sorry,刚才打错了。12/7 －(5/7 +1/2 ) [1-(1/4 +3/8 )]÷1/4 1/8 ×58+1/8 ×42 4/5 ×4/7 ×5/4 －1/3 5/9 ×6+4/9 ÷1/6 180÷2.5÷4
= 12/7 －5/7 -1/2
=1/2
[1-(1/4 +3/8 )]÷1/4
=3/8 *4
=3/2
1/8 ×58+1/8 ×42
= 1/8 ×(58+42 )
=1/8 ×100
=12.5
4/5 ×4/7 ×5/4 －1/3
= 4/7 －1/3
=5/21
5/9 ×6+4/9 ÷1/6
= ( 5/9 +4/9 )*6
=6
180÷2.5÷4
=180÷(2.5*4)
=180÷10
=18
做两次。请采纳吧。追问
sorry,刚才打错了。12/7 －(5/7 +1/2 ) [1-(1/4 +3/8 )]÷1/4 1/8 ×58+1/8 ×42 4/5 ×4/7 ×5/4 －1/3 5/9 ×6+4/9 ÷1/6 180÷2.5÷4
脱式计算,(能简算的要简算)?
12÷0.16÷0.5 =12÷（0.16×0.5）=12÷0.08 =150
能简算的要简算(脱式计算)
脱式计算,能简算的要简算: 127 -(57 +12 ) =127-57-12 =70-12 =58 [1-(14 +38 )]÷1\/4 = 4-52*4 = (60-1)*6+49\/16 =360-6+3又16分之1 =354+3又16分之1 =357又16分之1 180÷2.5÷4 =180÷(2.5*4) =180÷10 =18 白做了半天！ 12...
脱式计算(能简算要简算)108x98
脱式计算如下：108×98 =108×（100-2）=108×100-108×2 =10800-216 =10584 【
脱式计算,能简算的要简算.2.139÷9.3×6.2
解题思路：（1）（3）从左往右依次计算．（2）（4）运用乘法分配律简算．（1）2.139÷9.3×6.2 =0.23×6.2 =1.426 （2）2.06+2.06×99 =2.06×（99+1）=2.06×100 =206 （3）0.72×0.8÷0.32 =0.576÷0.32 =1.8 （4）3.8×1.96-3.8×0.96 =3.8×（1.96-...
我会脱式计算.(能简算的要简算)
解题思路：（1）运用乘法结合律简算；（2）先算乘法，再算减法；（3）把101看作100+1，运用乘法分配律简算．（1）2.12×0.8×5 =2.12×（0.8×5）=2.12×4 =8.48 （2）54.5-7.2×3.5 =54.5-25.2 =29.3 （3）0.65×101 =0.65×（100+1）=0.65×100+0.65 =65+0....
完成脱式计算,能简算的要简算?
原式=7\/8 - 7\/8 + 3\/4=3\/4 原式=1 + 5\/6=1又5\/6 原式=7\/13 + 7\/13 - (3\/7 + 2\/7)=14\/13 - 5\/7=1\/13 + 1 - 5\/7 =1\/13 + 2\/7=7\/91 + 26\/91=33\/91 原式=4\/5 - (2\/4 + 1\/4)=4\/5 - 3\/4 =16\/20 - 15\/20=1\/20 2、解：x=3\/5 - 2\/...
2.脱式计算,能简算的要简算 (9分)l=2.8-3\/(10)+7\/(10)= 15+512+17?
（1）2.8-3\/10+7\/10 =2.8-0.3+0.7 = 2.5+0.7 =3.2。（2）15+512+17 =527+17 =544。
脱式计算。。能简算的要简算。 注意能简算的要简算!!!拜托各位了,谢谢...
=486-25×12 =0.63÷﹙0.375×8﹚=486-300 =0.63÷3 =186 =0.21 ③2008÷（2008+2008\/2009)+1\/2010 =2008÷2008+2008÷（2008\/2009）+1\/2010 =1+2009+1\/2010 =2010+1\/2010 ④(8+4\/9)÷4×(18\/19)=(8÷4+4\/9)÷4×(18\/19)=(2+1\/9)×(18\/19)=(19\/9)...
脱式计算,能简算的要简算. 0.9×2.5×0.4 1.25×3.4×0.8 17.8×99...
（1）0.9×2.5×0.4 =0.9×（2.5×0.4）=0.9×1 =0.9；（2）1.25×3.4×0.8 =1.25×0.8×3.4 =1×3.4 =3.4；（3）17.8×99 =17.8×（100-1）=17.8×100-17.8×1 =1780-17.8 =1762.2．
